Outdoor unit

ABSTRACT

In an outdoor unit including a heat exchanger, and a housing having a front panel, side panels, and a back panel, the back panel includes a connection port attachment portion to which a pipe connection port is attached, and a heat exchanger holding piece to which the heat exchanger is attached.

TECHNICAL FIELD

The present invention relates to an outdoor unit of a refrigerationcycle apparatus.

BACKGROUND ART

Typically in an outdoor unit of a refrigeration cycle apparatus such asan air-conditioning apparatus, a compressor, a heat exchanger, a fan,and other components are housed in a housing. Moreover, the outdoor unitof the air-conditioning apparatus is connected, through a refrigerantpipe, to an indoor unit housing a heat exchanger, a fan, and othercomponents. In the air-conditioning apparatus, when the compressor isdriven, refrigerant circulates between the indoor unit and the outdoorunit through the refrigerant pipe.

When such a refrigerant pipe is to be connected to the outdoor unit, therefrigerant pipe is attached to a connection port provided on an outersurface of the housing of the outdoor unit. The position of theconnection port is on a back panel side of the housing (see PatentLiterature 1), for example.

CITATION LIST Patent Literature

Patent Literature 1: Japanese Unexamined Patent Application PublicationNo. 11-264586

SUMMARY OF INVENTION Technical Problem

An internal refrigerant circuit connecting the compressor, a four-wayvalve, the heat exchanger, and other components is complicatedly housedin the outdoor unit. In particular, in a machine chamber housing thecompressor, components such as the refrigerant pipe connected to thepipe connection port and a refrigerant pipe connected to the heatexchanger are in a complicated arrangement. With a poor assemblyaccuracy of each member, the refrigerant pipe and other components maycontact peripheral members due to vibration of the compressor,generating operation noise.

The present invention has been made to solve such a problem, and isintended to provide an outdoor unit generating reduced operation noiseby improvement of the assembly accuracy of each member around a pipeconnection port of the outdoor unit.

Solution to Problem

The outdoor unit of an embodiment of the present invention includes aheat exchanger, and a housing having a front panel, a side panel, and aback panel. The back panel includes a connection port attachment portionto which a pipe connection port is attached, and a heat exchangerholding piece to which the heat exchanger is attached.

Advantageous Effects of Invention

In the outdoor unit of the embodiment of the present invention, the heatexchanger and the pipe connection port are attached to the back panel,and the heat exchanger and an internal refrigerant circuit in a machinechamber housing a compressor and other components are accuratelypositioned relative to each other. Thus, the assembly accuracy of eachmember around the pipe connection port, such as the internal refrigerantcircuit and the heat exchanger, can be improved, and consequently,operation noise due to contact with a refrigerant pipe and othercomponents can be reduced.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front perspective view of an outdoor unit of Embodiment 1.

FIG. 2 is a back perspective view of the outdoor unit of Embodiment 1.

FIG. 3 is a back perspective view of the outdoor unit of Embodiment 1from an angle different from that of FIG. 2.

FIG. 4 is a sectional plan of the outdoor unit of Embodiment 1 viewedfrom above.

FIG. 5 is a partially-enlarged view of a pipe connection port A portionin FIG. 4 of the outdoor unit of Embodiment 1.

FIG. 6 is a perspective view of a heat exchanger and a back panel in theoutdoor unit of Embodiment 1.

FIG. 7 is a perspective view of the heat exchanger and the back panel inthe outdoor unit of Embodiment 1 from an angle different from that ofFIG. 6.

FIG. 8 is a plane view and a four-sided view of the back panel of theoutdoor unit of Embodiment 1.

FIG. 9 is a perspective view of a heat exchanger and a back panel in anoutdoor unit of Embodiment 2.

FIG. 10 is a perspective view of the heat exchanger and the back panelin the outdoor unit of Embodiment 2 from an angle different from that ofFIG. 14.

FIG. 11 is a perspective view of the back panel of the outdoor unit ofEmbodiment 2.

FIG. 12 is a perspective view of the back panel of the outdoor unit ofEmbodiment 2 from an angle different from that of FIG. 4.

FIG. 13 is a perspective view of the back panel of the outdoor unit ofEmbodiment 2 from an angle different from those of FIGS. 4 and 5.

FIG. 14 is a plane view and a four-sided view of the back panel of theoutdoor unit of Embodiment 2.

FIG. 15 is a plane view and a four-sided view of an end plate panel ofthe outdoor unit of Embodiment 2.

DESCRIPTION OF EMBODIMENTS

An outdoor unit of an air-conditioning apparatus of the presentinvention will be described below with reference to the drawings.

The configuration of the outdoor unit described below is merely anexample, and the outdoor unit of the present invention is not limited tosuch a configuration. Moreover, the same or no reference signs are usedto represent the same or equivalent elements in each drawing. Further, adetailed structure will be optionally illustrated in a simplified form,or be optionally omitted from an illustration. In addition, overlappingor similar description will be optionally summarized or omitted.

Embodiment 1

An outdoor unit of Embodiment 1 will be described with reference toFIGS. 1 to 3.

FIG. 1 is a front perspective view of the outdoor unit of Embodiment 1.

FIG. 2 is a back perspective view of the outdoor unit of Embodiment 1.

FIG. 3 is a back perspective view of the outdoor unit of Embodiment 1from an angle different from that of FIG. 2.

<Configuration of Outdoor Unit>

A housing 1 of the outdoor unit is made of sheet metal in asubstantially parallelepiped rectangular shape as illustrated in FIG. 1.As illustrated in FIGS. 1 to 3, the housing 1 mainly includes a frontpanel 10 disposed on a front side of the housing 1, two side panels 20covering lateral sides of the housing 1, a back panel 30_1 disposed on aback side of the housing 1, a top panel 40 covering an upper surface ofthe housing 1, and a bottom panel 50 covering a lower surface of thehousing 1.

A front grille 11 with an opening through which external air passes isattached to the front panel 10. A terminal block (not shown) connectedto a power supply line for supplying power to the outdoor unit isdisposed on the lateral side of the housing 1, and a terminal blockcover 21 covering the terminal block is attached to one of the sidepanels 20. Two elongated leg portions 60 supporting the outdoor unit areattached to the lower surface of the housing 1 to extend across ashort-side direction of the housing 1. A bolt hole for fixing one of theleg portions 60 to, for example, a resin or concrete base block opensthrough each end of the corresponding one of the leg portions 60.

A compressor (not shown) compressing refrigerant, a heat exchanger 2exchanging heat between external air and refrigerant, a fan 3 supplyingthe heat exchanger 2 with external air, and other components are housedin the housing 1.

The heat exchanger 2 is, for example, a finned tube heat exchangerhaving a heat transfer pipe penetrating a plurality of thin plate-shapedaluminum fins arranged in parallel, and the entirety of the heatexchanger 2 is formed in a substantially L-shape and is disposed alongthe back and lateral sides of the housing 1. Fins stand in the verticaldirection and the heat transfer pipe penetrates the fins in thehorizontal direction.

The fan 3 is provided in the vicinity of the heat exchanger 2, andexternal air passes, by rotation of the fan 3, between the fins of theheat exchanger 2 to exchange heat between the external air andrefrigerant flowing through the heat transfer pipe of the heat exchanger2. The external air subjected to heat exchange is discharged to theoutside of the housing 1 from the front grille 11.

When the outdoor unit of the air-conditioning apparatus as describedabove is operated for heating operation, for example, the heat exchanger2 acts as an evaporator. In this case, low-pressure gas refrigerantevaporated by removal of heat from external air is compressed intohigh-pressure gas refrigerant by the compressor, and then, thehigh-pressure gas refrigerant is supplied to an indoor heat exchanger(not shown) of an indoor unit.

On the other hand, in the case of cooling operation, the heat exchanger2 acts as a condenser. In this case, high-pressure gas refrigerantcompressed in the compressor is condensed by transfer of heat toexternal air in the heat exchanger 2. Then, the pressure of thecondensed liquid refrigerant is reduced, and the resultant refrigerantis supplied to the indoor heat exchanger (not shown) of the indoor unit.

<Connection Ports (Corresponding to Pipe Connection Ports of the PresentInvention)>

As illustrated in FIGS. 2 and 3, each pipe connection port (a gas pipeconnection port 70, a liquid pipe connection port 71) for connecting theoutdoor unit and a refrigerant communication pipe for connection betweenthe outdoor unit and the indoor unit is disposed on the back side of thehousing 1. The gas pipe connection port 70 and the liquid pipeconnection port 71 are attached to the back panel 30_1 of the housing 1.Of the refrigerant communication pipes, a gas pipe is connected to thegas pipe connection port 70, and a liquid pipe is connected to theliquid pipe connection port 71.

The gas pipe connection port 70 is a joint for connecting the gas pipeof the refrigerant communication pipes to a gas-side pipe of an internalrefrigerant circuit housed in the housing 1 of the outdoor unit. The gaspipe connection port 70 is a tubular member attached in an axialdirection of the gas pipe connection port 70, which is substantiallycoincident with a front-to-back direction (a depth direction) of thehousing 1, and is made of brass, for example. The gas pipe connectionport 70 includes a valve body having a hexagonal cross sectionperpendicular to the axial direction.

The gas pipe connection port 70 is, by brazing (thermal bonding betweenmetal and metal with brazing filler metal), bonded to a terminal endportion of the gas-side pipe of the internal refrigerant circuit housedin the housing 1.

The liquid pipe connection port 71 is a joint for connecting the liquidpipe of the refrigerant communication pipes to a liquid-side pipe of theinternal refrigerant circuit housed in the housing 1 of the outdoorunit. The liquid pipe connection port 71 is a tubular member attached inan axial direction of the liquid pipe connection port 71, which issubstantially coincident with the front-to-back direction (the depthdirection) of the housing 1 as in the gas pipe connection port 70, andis made of brass, for example. The liquid pipe connection port 71includes a valve body having a hexagonal cross section perpendicular tothe axial direction.

The liquid pipe connection port 71 has a configuration substantiallysimilar to that of the gas pipe connection port 70. However, theliquid-side pipe of the internal refrigerant circuit has a smallerdiameter than that of the gas-side pipe, and consequently, the liquidpipe connection port 71 has a smaller diameter than that of the gas pipeconnection port 70.

The liquid pipe connection port 71 is, by brazing (thermal bondingbetween metal and metal with brazing filler metal), bonded to a terminalend portion of the liquid-side pipe of the internal refrigerant circuithoused in the housing 1.

<Back Panel>

Next, the structure of the back panel 30_1 will be described withreference to FIGS. 4 to 8.

As illustrated in FIGS. 2 and 3, the back panel 30_1 covers the backside of the housing 1 and is formed by sheet-metal processing, forexample. The back panel 30_1 is fixed to the heat exchanger 2, and isconnected to one of the side panels 20 with, for example, screws.

FIG. 4 is a sectional plan of the outdoor unit of Embodiment 1 viewedfrom above.

FIG. 5 is a partially-enlarged view of a pipe connection port portion inFIG. 4 of the outdoor unit of Embodiment 1.

FIG. 6 is a perspective view of the heat exchanger and the back panel inthe outdoor unit of Embodiment 1.

FIG. 7 is a perspective view of the heat exchanger and the back panel inthe outdoor unit of Embodiment 1 from an angle different from that ofFIG. 6.

FIG. 8 is a plane view and a four-sided view of the back panel of theoutdoor unit of Embodiment 1.

As illustrated in FIGS. 4 and 5, a protruding attachment portion 31(corresponding to a connection port attachment portion of the presentinvention) for attachment of the gas pipe connection port 70 and theliquid pipe connection port 71 is formed at a lower portion of the backpanel 30_1. The protruding attachment portion 31 is in a shapeprotruding toward the outside of the housing 1. Moreover, as illustratedin FIGS. 6 and 7, an attachment opening 32 and bolt holes 33 forattachment of each of the two pipe connection ports (the gas pipeconnection port 70 and the liquid pipe connection port 71) open throughthe protruding attachment portion 31.

Each of the gas pipe connection port 70 and the liquid pipe connectionport 71 is inserted into a corresponding one of the attachment openings32 in the axial direction, and is fixed to the back panel 30_1 byfastening of bolts to the bolt holes 33.

As illustrated in FIG. 8, the back panel 30_1 is formed to have across-sectional shape with a plurality of constituent surfaces.

A heat exchanger holding piece 34 having many holding holes 34 a openingthrough the heat exchanger holding piece 34 and holding the heattransfer pipe of the heat exchanger 2 is provided on one end side of theback panel 30_1. A back portion 35 forming a part of the back-sideoutline of the housing 1 is perpendicularly formed from one side of theheat exchanger holding piece 34.

Moreover, a side panel connection piece 37 having screw holes 37 aopening through the side panel connection piece 37 and connected to oneof the side panels 20 is provided on the other end side of the backpanel 30_1.

Further, at a substantially center portion of the back panel 30_1, arecessed portion 36 provided with the protruding attachment portion 31to which the pipe connection ports are attached is formed in a shaperecessed from the back portion 35 and the side panel connection piece 37toward the inside of the housing 1.

The recessed portion 36 and the back portion 35 are smoothly connectedtogether through an inclined surface 38, and the recessed portion 36 andthe side panel connection piece 37 are smoothly connected togetherthrough another inclined surface 38.

The back portion 35, the recessed portion 36, and the side panelconnection piece 37 are substantially arranged parallel to each other.

When the back panel 30_1 with the above-described configuration isattached to the housing 1, the recessed portion 36 is recessed towardthe inside of the housing 1 from the peripheral edge of the bottom panel50 as illustrated in FIGS. 2 and 3. With this configuration, dewcondensation water adhering to the gas pipe connection port 70 and theliquid pipe connection port 71 flows down onto the bottom panel 50, andconsequently, does not drop to a lower portion of the outdoor unit.

As illustrated in FIGS. 6 and 7, the heat exchanger holding piece 34 ofthe back panel 30_1 serves as an end plate of the heat exchanger 2, andis attached in contact with an end portion of the fins of the heatexchanger 2. Moreover, the heat transfer pipe of the heat exchanger 2 isinserted into the holding holes 34 a of the heat exchanger holding piece34, and the back panel 30_1 and the heat exchanger 2 are fixed together.

The gas pipe connection port 70 and the liquid pipe connection port 71are attached to the protruding attachment portion 31 provided at therecessed portion 36, and the internal refrigerant circuit housed in amachine chamber of the housing 1 housing the compressor is connected toeach pipe connection port. That is, the internal refrigerant circuit inthe machine chamber is fixed to the back panel 30_1 through each pipeconnection port.

When the outdoor unit is viewed from above as illustrated in FIG. 4, tipend portions 72 of the gas pipe connection port 70 and the liquid pipeconnection port 71 are provided not to protrude to the outside beyond atip end position 60 a of each leg portion 60 of the housing 1. That is,the tip end portions 72 of the gas pipe connection port 70 and theliquid pipe connection port 71 outwardly (corresponding to a firstdirection of the present invention) protrude perpendicular to the backpanel 30_1, but are provided not to protrude to the outside beyond avirtual line 30 a passing through the tip end position 60 a of each legportion 60 and extending parallel to the back panel 30_1 (the tip endportion 72 of each pipe connection port is positioned closer to the backpanel 30_1 than the virtual line 30 a is).

<Advantageous Effects>

In the outdoor unit of Embodiment 1, the heat exchanger 2 and theinternal refrigerant circuit in the machine chamber housing thecompressor and other components are fixed to the back panel 30_1, andare accurately positioned relative to each other. Thus, the assemblyaccuracy of each member around the pipe connection ports, such as theinternal refrigerant circuit and the heat exchanger 2, can be improved,and operation noise due to, for example, contact with a refrigerant pipecan be reduced.

Moreover, the gas pipe connection port 70 and the liquid pipe connectionport 71 are arranged at the recessed portion 36 of the back panel 30_1and the tip end portions 72 of the gas pipe connection port 70 and theliquid pipe connection port 71 are arranged not to protrude to theoutside beyond the virtual line 30 a passing through the tip endposition 60 a of each leg portion 60 and extending parallel to the backpanel 30_1. Thus, a packing size is not increased merely by thedimensions of the protrusion of each pipe connection port.

Further, the recessed portion 36 of the back panel 30_1 is, as describedabove, recessed toward the inside of the housing 1 from the peripheraledge of the bottom panel 50. Thus, dew condensation water adhering tothe gas pipe connection port 70 and the liquid pipe connection port 71flows down onto the bottom panel 50, and consequently, does not drop tothe lower portion of the outdoor unit.

Embodiment 2

In Embodiment 1, the example of the outdoor unit having the back panel30_1 of the housing 1 integrally formed has been described. However, anexample of an outdoor unit having a back panel 30_1 separately formedwill be described in Embodiment 2.

<Configurations of Outdoor Unit and Pipe Connection Ports>

The configurations of the outdoor unit and the pipe connection ports aresimilar to those of Embodiment 1, and description of the configurationswill not be made.

<Back Panel>

Next, the structure of a back panel 30_2 will be described withreference to FIGS. 9 to 15.

As in Embodiment 1, the back panel 30_2 covers a back side of a housing1 as illustrated in FIGS. 2 and 3 and is formed by sheet-metalprocessing, for example. The back panel 30_2 is fixed to a heatexchanger 2, and is connected to one of side panels 20 with, forexample, screws.

FIG. 9 is a perspective view of the heat exchanger and the back panel inthe outdoor unit of Embodiment 2.

FIG. 10 is a perspective view of the heat exchanger and the back panelin the outdoor unit of Embodiment 2 from an angle different from that ofFIG. 14.

FIG. 11 is a perspective view of the back panel of the outdoor unit ofEmbodiment 2.

FIG. 12 is a perspective view of the back panel of the outdoor unit ofEmbodiment 2 from an angle different from that of FIG. 4.

FIG. 13 is a perspective view of the back panel of the outdoor unit ofEmbodiment 2 from an angle different from those of FIGS. 4 and 5.

FIG. 14 is a plane view and a four-sided view of the back panel of theoutdoor unit of Embodiment 2.

FIG. 15 is a plane view and a four-sided view of an end plate panel ofthe outdoor unit of Embodiment 2.

As in Embodiment 1, a protruding attachment portion 31 (corresponding toa connection port attachment portion of the present invention) forattachment of a gas pipe connection port 70 and a liquid pipe connectionport 71 is formed at a lower portion of the back panel 30_2 asillustrated in FIGS. 9 and 10. The protruding attachment portion 31 isin a shape protruding toward the outside of the housing 1. Moreover, anattachment opening 32 and bolt holes 33 for attachment of each of thetwo pipe connection ports (the gas pipe connection port 70 and theliquid pipe connection port 71) open through the protruding attachmentportion 31.

Each of the gas pipe connection port 70 and the liquid pipe connectionport 71 is inserted into a corresponding one of the attachment openings32 in an axial direction, and is fixed to the back panel 30_2 byfastening of bolts to the bolt holes 33.

As illustrated in FIGS. 11 to 14, the back panel 30_2 is formed to havea cross-sectional shape with a plurality of constituent surfaces.

A flat plate-shaped back panel 30_2 forming a part of the back-sideoutline of the housing 1 is provided on one end side of the back panel30_2. Screw holes 35 a for attachment with a heat exchanger holdingmember 39 open through an end portion of the back panel 30_2.

A flat plate-shaped side panel connection piece 37 is provided on theother end side of the back panel 30_2. Screw holes 37 a connected toscrew holes 20 a of the one of the side panels 20 with screws openthrough an end portion of the side panel connection piece 37.

Further, at a substantially center portion of the back panel 30_2, arecessed portion 36 provided with the protruding attachment portion 31to which the pipe connection ports are attached is formed in a shaperecessed from a back portion 35 and the side panel connection piece 37toward the inside of the housing 1.

The recessed portion 36 and the back portion 35 are smoothly connectedtogether through an inclined surface 38, and the recessed portion 36 andthe side panel connection piece 37 are smoothly connected togetherthrough another inclined surface 38.

The back portion 35, the recessed portion 36, and the side panelconnection piece 37 are substantially arranged parallel to each other.

<Heat Exchanger Holding Member>

The heat exchanger holding member 39 is a flat plate-shaped memberhaving many holding holes 39 a open through the heat exchanger holdingmember 39 and holding a heat transfer pipe of the heat exchanger 2 asillustrated in FIGS. 11 to 13 and FIG. 15. The heat exchanger holdingmember 39 is attached to one end side of the back portion 35 with theheat exchanger holding member 39 being perpendicular to the back portion35 of the back panel 30_2. In this state, the heat exchanger holdingmember 39 and the back portion 35 are fixed together by screws insertedinto screw holes 39 b of the heat exchanger holding member 39 and thescrew holes 35 a of the back portion 35.

When the back panel 30_2 with the above-described configuration isattached to the housing 1, the recessed portion 36 is, as in FIGS. 2 and3 of Embodiment 1, recessed toward the inside of the housing 1 from theperipheral edge of a bottom panel 50. With this configuration, dewcondensation water adhering to the gas pipe connection port 70 and theliquid pipe connection port 71 flows down onto the bottom panel 50, andconsequently, does not drop to a lower portion of the outdoor unit.

The gas pipe connection port 70 and the liquid pipe connection port 71are attached to the protruding attachment portion 31 provided at therecessed portion 36 of the back panel 30_2, and an internal refrigerantcircuit housed in a machine chamber of the housing 1 housing acompressor is connected to each pipe connection port. That is, theinternal refrigerant circuit in the machine chamber is fixed to the backpanel 30_2 through each pipe connection port.

As illustrated in FIGS. 9 and 10, the heat exchanger holding member 39serves as an end plate of the heat exchanger 2, and is attached incontact with an end portion of the fins of the heat exchanger 2.Moreover, the heat transfer pipe of the heat exchanger 2 is insertedinto the holding holes 39 a of the heat exchanger holding member 39.Thus, the heat exchanger 2 and the back panel 30_2 are integratedtogether by connecting the heat exchanger holding member 39 to the backportion 35 of the back panel 30_2.

Moreover, as in Embodiment 1, when the outdoor unit is viewed from aboveas illustrated in FIG. 4, tip end portions 72 of the gas pipe connectionport 70 and the liquid pipe connection port 71 are provided not toprotrude to the outside beyond a tip end position 60 a of each legportion 60 of the housing 1. That is, the tip end portions 72 of the gaspipe connection port 70 and the liquid pipe connection port 71 outwardly(corresponding to a first direction of the present invention) protrudeperpendicular to the back panel 30_2, but are provided not to protrudeto the outside beyond a virtual line 30 a passing through the tip endposition 60 a of each leg portion 60 and extending parallel to the backpanel 30_2 (the tip end portion 72 of each pipe connection port ispositioned closer to the back panel 30_2 than the virtual line 30 a is).

<Advantageous Effects>

In addition to the advantageous effects of Embodiment 1, the back panel30_2 and the heat exchanger holding member 39 are separated in theoutdoor unit of Embodiment 2. Consequently, the degree of freedom isincreased in the step of connecting the heat exchanger 2 and the backpanel 30_2 together, and the efficiency of manufacturing of the outdoorunit is improved.

REFERENCE SIGNS LIST

1 housing, 2 heat exchanger, 3 fan, 10 front panel, 11 front grille, 20side panel, 20 a screw hole, 21 terminal block cover, 30_1 back panel,30_2 back panel, 30 a virtual line, 31 protruding attachment portion(corresponding to a connection port attachment portion of the presentinvention), 32 attachment opening, 33 bolt hole, 34 heat exchangerholding piece,

34 a holding hole, 35 back portion, 35 a screw hole, 36 recessedportion, 37 side panel connection piece, 37 a screw hole, 38 inclinedsurface, 39 heat exchanger holding member, 39 a holding hole, 39 b screwhole, 40 top panel, 50 bottom panel, 60 leg portion, 60 a tip endposition, 70 gas pipe connection port (corresponding to a pipeconnection port of the present invention), 71 liquid pipe connectionport (corresponding to a pipe connection port of the present invention),72 tip end portion

1. An outdoor unit comprising: a housing including a front panel, a sidepanel, and a back panel; and a heat exchanger, the back panel includinga connection port attachment portion to which a pipe connection port isattached, a heat exchanger holding piece to which the heat exchanger isattached, a back portion forming a part of an outer outline of thehousing, and a recessed portion provided with the connection portattachment portion, the recessed portion being disposed on an inner sideof the housing from the back portion.
 2. (canceled)
 3. The outdoor unitof claim 1, wherein the back panel includes the heat exchanger holdingpiece, the back portion, the recessed portion, and a side panelconnection piece to connect the side panel.
 4. The outdoor unit of claim1, wherein the heat exchanger holding piece is a separate body from theback portion, and is attached to the back portion.
 5. The outdoor unitof claim 1, wherein the heat exchanger holding piece has a holding holethrough which a heat transfer pipe of the heat exchanger passes.
 6. Theoutdoor unit of claim 1, wherein a leg portion configured to support thehousing is attached to a bottom surface of the housing, and a tip endportion of the pipe connection port in a first direction perpendicularto the back panel is positioned closer to the back portion than a tipend position of the leg portion is.
 7. The outdoor unit of claim 1,wherein the connection port attachment portion is configured to protrudefrom the recessed portion toward an outside of the housing.